Your SlideShare is downloading.
×

- 1. Operator Kinds of Operator Precedence of Operator Type Casting
- 2. Operator Decide the semantics of expression Meaning of operator given in language system
- 3. Kinds of Operator Arithmetic Op. : + - * / % Relational Op. : > >= < <= == != Logical Op. : && || ! Inc/Dec Op. : ++ -- Bit Op. : & | ^ ~ << >> >>> Operators of Java Conditional Op. : ?: Assign Op. : = += -= *= /= %= &= ^= |= >>= <<= >>>= Casting Op. : (Data Type) Array Op. : [] Method Op. : () . instanceof Op. : instanceof
- 4. Arithmetic Operator Operator for arithmetic operation Single term operator : +, - Binary term operator : +, -, *, /, % [ArithmeticOperators.java] x = -5 ; x = -(-5) ; x = -(3-5) ;
- 5. Arithmetic Operator Real type operation Floating point discription and operation: IEEE754 Standard underflow, overflow Infinitive arithmetic java.lang.Float, java.lang.Double, POSITIVE_INFINITY, NEGATIVE_INFINITY constant NaN(Not a Number)
- 6. Arithmetic Operator Add, Substract Multiply, Divide x y x+y x-y +I.F +I.F +I.F NaN +I.F - I.F NaN +I.F - I.F +I.F NaN - I.F - I.F - I.F - I.F NaN NaN +I.F NaN NaN x y x/y x%y Finite 0.0 I.F NaN Finite I.F 0.0 0.0 0.0 NaN NaN I.F Finite I.F NaN I.F I.F NaN NaN [InfinityArithmetic.java]
- 7. Relational Operator Compare two value Result : true or false Expression include relational operator for, while, ... Operator , , , , , precedence [RelationalOperators.java] a > b + c ===> a > (b + c) b == x < y ===> b == (x < y)
- 8. Conditional Operator Conditional Logical Relationship of two operands Operator ! , && , || [LogicalOperators.java] a < b && b < c 1 2 3
- 9. Increment & Decrement Operator Operator ++, -- Prefix operator Postfix operator Cannot use at expression, only at variable Cannot apply at real type [IncDecOperators.java] n = 1; x = ++n; // x=2, n=2 n = 1; x = n++; // x=1, n=2 (a + b)++ // error
- 10. Bitwise Operator Operator &, |, <<, >>, >>>, ^, ~ Operand should be integer type Precedence Operator Precedence ~ << >> >>> & ^ | (H) (L)
- 11. Bitwise Operator Bitwise AND 10012 & 00112 = 00012 To extract the special area in variable by masking that area Bit OR 10012 | 00112 = 10112 Exclusive AND 10012 ^ 00112 = 10102 1’s Complement ~ 000010102 = 111101012 [BitOperators.java]
- 12. Bitwise Operator Bitwise Shift Operator Shift lefe(<<) Shift right(>>) Unsigned shift right(>>>) Give this operator because Java does not support unsigned integer. [ShiftOperators.java] x << y = x * 2y x >> y = x / 2y
- 13. The Conditional Operator Operator Expr1 ? Expr2 : Expr3 (3 Terms Operator) [ConditionalOperator.java] [PrintTenItem.java] m = a > b ? (c > a ? c : a) : (c > b ? c : b) ; max = x > y ? x : y ; if (x > y) max = x; else max = y;
- 14. Assignment Operators Operator Arithmetic operator : + - * / % Bitwise operator : & | ^ << >> >>> [AssignmentOperators.java] Expr 1 = Expr 1 op Expr2 Expr1 op= Expr 2 x = x * y + 1; x *= y + 1; x = x * (y+1) sum = sum + i ; sum += i ;
- 15. Cast Operator Data Type Casting Operator Cast operator : ( , ) [CastOperator.java] (Data Type) 식 (int) 3.75 ===> 3 (float) 3 ===> 3.0 (float) (1 / 2) ===> 0.0 (float)1/2 ===> 0.5
- 16. Operator Precedence Operator Association Precedence () [] . ! ~ ++ -- + - (Data Type) * / % + - << >> >>> < <= > >= instance == != & ^ | && || ? : = += -= *= /= %= &= ^= |= <<= >>= >>>= Left Assoc. (High) Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. Left Assoc. (Low)